Measuring device



Nov. 27 1923 1,475,831

C. W. JOHNSON ET AL MEASURING DEVICE Filed Feb. 13. 1920 WITNESSES: Ch I [wall/10$ &

ar er mm WWW Theodore flfifmeyer BY M'ORNEY Patented Nov. 27, 1923.

UNITED STATES PATENT OFFICE.

CHARLES JOHNSON AND THEODORE ABTMEYER, F PITTSBURGH, PENNSYLVANIA,

ASSIGNORS TO WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY, A COR- PORATION OF PENNSYLVANIA.

MEASURING nnvron.

Application filed February 13, 1920. Serial No. 358,376.

T 0 all whom it may concern:

Be it known we, CHARLES W. JOHNSON, a citizen of the United States, and a resident of Pittsburgh, in the county of Allegheny and State of-Pennsylvania, and THEODORE ABTMEYER, a citizen of the United States, and a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Measuring Devices, of which the following is a specification.

Our invention relates to time measuring devices and, particularly, to electricallycontrolled means for indicating the period of time an intermittently operated machine has been in operation. 7

One object of our invention is to provide a device of the above indicated character that shall indicate the amount of time a dynamoelectric machine has been operated, so that the'time an operator has permitted his machine to remain idle will be shown.

Another object is to prevent a workman from succeeding in an effort to deceive his subjecting it to working loads.

Ourinvention depends upon the principle that a motor utilizes greater electrical energy when it is subject to working loads than when it is permitted to operate without doing useful work. p

In practicing our invention, we provide a clock, an electromagnet for stopping and starting the clock and an overload relay for opening and closing a circuit containing the electromagnet. The number of hours and fractions thereof the clock has run indicates the time the machine has been operated under working loads.

The single figure of the accompanying drawing is adiagrammatic view of a timemeasuring system embodying ourinvention.

In general, our invention comprises a plu rality of clocks 1, each having a balance wheel 2 that may be started or stopped by an electromagnet 3 which is energized in response to the operation of a dynamo-elec tric machine 4. i

The electromagnets 3 are connected to a source of electricalenergy 5, such as a storage battery or a generator, by bus-bars 6 and conductors 7 Fuses 8 are provided for the protection of the electromagnet, and a resistance 9 is provided for lowering the voltage.

employer by running his machine without A relay 10 has a movable arm 11 that engages a stationary contact member 12, thereby closing a circuit that comprises the wind-- ing of the electromagnet 3.

The relay 10 comprises core members 13, an armature disc 1A mounted on a rotatable shaft 15 and energizing coils 16, 16 and 17. Coils 16 and 16 are connected in shunt relation to each other, and the coil 16 is con nected in inductive relation to the coil 17 which is connected to conductors 19. A plug connector 20 is so provided for varying the number of turns of the energizing coil 17 that the relay 10 will close the circuit containing the electromagnet at any desired amount of current. Energy is transmitted to the operating machine 4: through electrical conductors 21 and a series transformer 22 is provided for energizing the coil 17 from the circuit through the conductors 19. The operation of the relays 10 is similar to the usual induction overload relays.

The electromagnet 3 comprises a supporting member 23, a core member 24:, an energizing coil 25, a pivotally mounted arm 26, a tension member or spring '27 and a resilient contact member 28 that engages the balance wheel 2.

When the operating machine is operating under load, suflicient current will traverse the same to operate the relay 10 which actuates the movable arm 11 to engage the stationary contact member 12, thereby completing the circuit that includes the coil 25 of the electromagnet 3. When the coil 25'is energized, the arm 26 is drawn against the core member 24.

The movement of the arm 26 from the position that is shown in the drawing disengages the resilient member 28 from the balance wheel 2, thereby permitting the wheel 2 to oscillate in the proper direction to insure. the starting of the clock mechanism.

When the load on the machine 4 decreases below that necessary to operate the relay 10, the arm 11 returns to the position shown in the drawing and the circuit of the coil 25 of the electromagnet 3 is opened, thereby tie-energizing the electromagnet and releasing the arm 26. The spring 27 so pulls the arm 26. outwardly that the resilient member 28 returns to the position shown in the drawing to prevent the oscillation of the balance wheel 2. i

Each motor 4; is provided with a clock 1. All of the clocks may be located in an otlice at a distance from toe machines which may be located ditlerent parts of a shop. .Vith this arrai'igrcincn t. the time during which any motor is operated under useful-load conditions may be ooservcd by an observer located remote y ith respe t to the i'nachine, thus roviding: means for determining the useful working time of an employee. The opera-- tion of the several. clocks similar to that set forth with respect to one of the clocks ll will he umlcrstood, however that. ii? the motors a o of ditlerei'it 'apacities or actuat m2 hines requiring the consumption of different values power. the current at which the various relays i0 become operative may be adjusted by the connector 20. If it desired. to determine the amount of time during which a motor is operated at a pre- (flcterinined load. two clock devices may be used. with their relays set to operate at the two values at current between which the clocks are desired to operate; or it it is desired to determine the amount of time during. which a motor is operated at various loads. a plurality of clock devices may be sed. with each relay set to operate at a ditrcrent value oi current than that of any other rclay.

li hilc we have shown our invention in a iu'clerred erm. it may be subjected to slight modifications. and. therefore. we desire to he lin'iited only by the scope of the appended claims.

We claim as our invention:

i. In an cilioiencv or output-indicating device. the combination with a main electric circuit and a motor energized from said circuit. of an indication mechanism. an electr0- responsive device tor controlling the operation (Ti Said indicating mechanism. an auxiliary circuit tor GJIGIQiZlDfl said electrorcinionsive device. a switch in said auxiliary circuit. and a device energized from said main circuit and. responsive onl to working: loads on said motor for closing said switch.

In an etlicicncv or output-indicating device. the combination with main electric circuit and a motor eiici-e".. c cl trom said cir cuit. oi an indicating mechanism. an electroresponsive device for controlling the operation off said indicating): mechanism. an auxiliary circuit For energizing; said electroresponsive device. a set ch in said auxiliary circuit. device eneroricd trom said main circuit and responsive only to working; loads on said v ctor tor closing; said switch. and arliustinp, means for rendering said switchclos no tlevicc responsive to working loads ct different values.

In etficiencv or output-indicating system. the combination with a plurality of motors adapted to be energized from a main or a plurality of main electric circuits, of a plurality of independent indicating mechanisms, an electro-responsive device for controlling the operation 0t each indicating mechanism, an auxiliary circuit for eners g each o'l said clectro-rcsponsive devices. a device cnereized from the circuit. of each motor and responsive only to workine loads on its respective motor for closing one of said switches. and adjusting means for rendering each of said switch-closing devices responsive to workingloads o't ditlcrent values.

4L. In an eitliciency or output-indicating system. the combination with an electrically driven machine adapted or periodic opera-- tion. of means controlled by the circuit of said machine and responsive to the operation thereof for indicating the duration oit' workng loads thereon.

5. In an elliciency or output-indicating system, the combination with an electrically driven machine adapted tor periodic operation. oi electro-responsive means controlled by the circuit of said machine for indicating the duration of working loads thereon.

6. In an efficiency-indicating system, the combination with a manually-controlled, electrically-driven fabricating machine subject to periodic operation, means controlled bythe circuit of said machine for indicating the duration of the useful working operation of? said machine.

7. In an clliciency indicatingr system. the combination with a manually-controlled. Fabricating machine subject to periodic operation and an electricmotor for driving said machine, of a time-indicating means. electrically-actuated means tor checking): and releasing said time-indicating means. and means energized from the motor circuit and responsive only to the working loads on said machine for controlling said checking and releasing means.

8. In an etliciency or output-indicating device, the combination with a main alternating-current circuit and a motor energized from said circuit. of an indicating mechanism. an GlGCtl'O-l'OSDOIlSiVO device :lor con trolling: the operation ot said indicating.- mechanism. an auxiliary directkcur ent circuit for energizing said auxiliary circuit. a currenttranstormer connected in said main circuit. a device connected to said transiormer and responsive only to worhii'ig loads on said motor for closing said switch. and adjustinir means tor rendering said switchclosine device responsive to working loads of diiierent values.

In testimony whereof. we have hereunto subscribed our names this 29th day of January. 1920.

QHARLES w. JOHNSON. 'rnnoo'onn ABTMEYER. 

